How to get good at games?

Not just good.  Pwnage.  As in Japanese/Korean pwnage (sorry, but I needed an adjective).  The Sai-GARest of gamers everywhere.
Discuss.

Game you might want to try getting good at: Super Smash Brothers melee.

www.smashboards.com

Good luck. Protip: You won't ever make it to the top.